#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm>
#include<queue>
#include<vector>
using namespace std;
int dp[5002];
vector<int>edges[5003];
int in[5003], out[5003];
int n, m;
queue<int>list;
int main()
{
    scanf("%d%d", &n, &m);
    for (int i = 0; i < m; i++)
    {
        int a, b;
        scanf("%d%d", &a, &b);
        //edges[a][b] = 1;
        edges[a].push_back(b);
        in[b]++;
        out[a]++;
    }
    for (int i = 1; i <=n; i++)
    {
        if (in[i] == 0)
        {
            list.push(i);
            dp[i] = 1;
        }
    }
    while (!list.empty())
    {
        int temp = list.front(); list.pop();
        for (int i =0; i <edges[temp].size(); i++)
        {    
                in[edges[temp][i]]--;
                if (in[edges[temp][i]] == 0)list.push(edges[temp][i]);
                dp[edges[temp][i]] =( dp[temp] + dp[edges[temp][i]])%80112002;
            
        }
    
    }
    int sum = 0;
    for (int i = 1; i <=n; i++)
    {
        if (out[i] == 0)
            sum = (sum + dp[i]) % 80112002;
    }
    printf("%d", sum);
}